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Showing 47541 - 47560 of 82805 results
  • The Effect of Ambient Concentration and Exercise on PortaCount Quantitative Fit Factors
    The Effect of Ambient Concentration and Exercise on PortaCount Quantitative Fit Factors
    Coffey, Christopher C. ;
    Jensen PL
    1999/10/10 | National Institute for Occupational Safety and Health (NIOSH)
    The PortaCount is a quantitative fit test method which uses ambient aerosols to determine the fit of a respirator. The current Occupational Safety and Health Administration (OSHA) regulations in the United States stipulate that eight exercises lasting one minute each are to be performed for this fit test. Ambient aerosol concentration levels vary g ...
    Public Domain
  • The Efficacy of the Bitrex Qualitative Fit Test Method with N95 FilteringFacepiece Respirators
    The Efficacy of the Bitrex Qualitative Fit Test Method with N95 Filtering-Facepiece Respirators
    Campbell, David D. ;
    Coffey, Christopher C.
    1999/10/10 | National Institute for Occupational Safety and Health (NIOSH)
    The Bitrex qualitative fit test is one of the qualitative fit tests referenced in the Occupational Safety and Health Administration regulations on respirators (Title 29, Code of Federal Regulations, 1910.134) and recommended by the National Institute for Occupational and Health for screening out respirators having poor facepiece fits. In this study ...
    Public Domain
  • Metabolic and Respiratory Responses During the Performance of a 60Minute Man Test 4
    Metabolic and Respiratory Responses During the Performance of a 60-Minute Man Test 4
    Eschenbacher, William L. ;
    Sinkule E
    1999/10/10 | National Institute for Occupational Safety and Health (NIOSH)
    Human physiological variables, such as body weight, height, strength, and aerobic capacity, can affect the results of such exercise tests as that used for Man Test 4 (MT4), a U. S. respirator certification test described in Title 42, Code of Federal Regulations, Part 84. The Automated Breathing and Metabolic Simulator (ABMS) is a computer-controlle ...
    Public Domain
  • Lung Cancer in Minders Exposed to Silica and Ionising Radiation a Feasibility Study
    Lung Cancer in Minders Exposed to Silica and Ionising Radiation – a Feasibility Study
    Cox-Ganser, Jean M. ;
    Ducatman B
    1999/10/10 | National Institute for Occupational Safety and Health (NIOSH)
    Does inhaled silica, or the presence of silicosis, interact with ionising radiation and other occupational carcinogens to potentiate lung cancer risks in man? Two pathologic pathways consistent with the idea would result in associations between exposures to silica and only specific types of lung cancer. This might explain some inconsistencies in re ...
    Public Domain
  • NIOSH SCSR Certification Program
    NIOSH SCSR Certification Program
    Merinar, Timothy R. ;
    Terry SL
    1999/10/10 | National Institute for Occupational Safety and Health (NIOSH)
    The National Institute for Occupational Safety and Health (NIOSH) tests and certifies respirators in accordance with the regulatory requirements of Title 42 Code of Federal Regulation (CFR) Part 84. This regulation identifies a wide range of specific respirator types in Subparts H thru L. This regulation also allows other types of respirators not s ...
    Public Domain
  • Update on NIOSH Standards Development Activities
    Update on NIOSH Standards Development Activities
    Berry Ann R ;
    Metzler, Richard W.
    1999/10/10 | National Institute for Occupational Safety and Health (NIOSH)
    The National Institute for Occupational Safety and Health (NIOSH) has published revised rulemaking priorities in the Federal Register on August 28, 1999 (64 FR 46178) based on public comments provided in response to earlier requests for input. The revised priorities represent a re-evaluation due to recent serious field problems with deployed SCSRs. ...
    Public Domain
  • Lung Cancer CaseControl Study of Beryllium Workers
    Lung Cancer Case-Control Study of Beryllium Workers
    Petersen, Martin R. ;
    Sanderson, Wayne T.
    1999/10/10 | National Institute for Occupational Safety and Health (NIOSH)
    Background: Beryllium compounds are toxic to the lungs, causing acute pneumonitis and chronic granulomatous lung disease. Cohort mortalilty studies have found elevated lung cancer mortality among beryllium processing workers compared to nonexposed populations, but none of these studies has evaluated the associaion between level of beryllium exposur ...
    Public Domain
  • The Oxygen Cost of a Mine Escape
    The Oxygen Cost of a Mine Escape
    Kovac JG ;
    Kravitz JH
    1999/10/10 | Mining Publications
    The objective of this study was to develop a practical method for planning a mine escape when miners must evacuate while wearing a Self-Contained Self-Rescuer (SCSR). In-mine data was gathered on escape times, distances and heart rates using miners making simulated escapes on foot and under oxygen from the deepest point of penetration in the mine t ...
    Public Domain
  • Mortality in DryCleaning Workers An Update
    Mortality in Dry-Cleaning Workers: An Update
    Ruder, Avima M.
    1999/10/10 | National Institute for Occupational Safety and Health (NIOSH)
    Background: Perchloroethylene (PCE) is a known animal carcinogen and probably human carcinogen to which over one-half million U.S. workers are exposed. This is the third report on a cohort of 1,708 dry-cleaning workers, identified from union records and now followed through 1996. All were exposed to PCE for at least one year before 1960; 625 worked ...
    Public Domain
  • SelfContained SelfRescuer Field Evaluation SixthPhase Results abstract
    Self-Contained Self-Rescuer Field Evaluation: Sixth-Phase Results [abstract]
    Kyriazi, Nicholas ;
    Shubilla, John P.
    1999/10/10 | Mining Publications
    The U.S. National Institute for Occupational Safety and Health, Pittsburgh Research Laboratory (PRL) (formerly part of the U.S. Bureau of Mines) has undertaken a study to determine how well self-contained self-rescuers (SCSRs), deployed in U.S. underground coal mines in accordance with Federal regulations (30 CFR 75.1714), held up in the undergroun ...
    Public Domain
  • Comparison of the Companion and Modified PortaCount Methods for Fit Testing N95 Respirators
    Comparison of the Companion and Modified PortaCount Methods for Fit Testing N95 Respirators
    Campbell DL ;
    Coffey, Christopher C.
    1999/10/10 | National Institute for Occupational Safety and Health (NIOSH)
    In 1995, the National Institute for Occupational Safety and Health (NIOSH) revised the particulate respirator performance regulations contained in Title 42 Code of Federal Regulations, Part 84. Soon after questions arose regarding whether N95 respirators (one of the new classes of particulate respirators) could be quantitatively fit tested. In resp ...
    Public Domain
  • Surveillance of Respirator Use and Programs
    Surveillance of Respirator Use and Programs
    Campbell DL ;
    Day BT
    1999/10/10 | National Institute for Occupational Safety and Health (NIOSH)
    This report describes currently existing United States data regarding nationwide patterns of respirator programs and practices. This review was one step toward surveillance of respirator use and practices within the U.S. The United States Occupational Safety and Health Administration (OSHA) compliance data for general industry during October 1997-S ...
    Public Domain
  • Lung Cancer Risk and Silica Exposure in Chinese Mines and Pottery Factories The Modifying Role of Other Workplace Lung Carcinogens
    Lung Cancer Risk and Silica Exposure in Chinese Mines and Pottery Factories: The Modifying Role of Other Workplace Lung Carcinogens
    Chen JQ ;
    Cocco P
    1999/10/10 | National Institute for Occupational Safety and Health (NIOSH)
    To explore whether exposure to other lung carcinogens, staging and clinical features of silicosis, and dust overload confound or modify the association between silica and lung cancer, we used data from a collaborative study conducted in the late 1980s in 29 Chinese mines and potteries. The study design was a nested case-control study of 316 lung ca ...
    Public Domain
  • Methodologic and Ethical Issues in Epidemiologic Risk Assessment of Occupational Hazards
    Methodologic and Ethical Issues in Epidemiologic Risk Assessment of Occupational Hazards
    Stayner L
    1999/10/10 | National Institute for Occupational Safety and Health (NIOSH)
    Quantitative analyses of the risks associated with occupational hazards has become a prerequisite for the developmentof occupational exposure limits in the U.S. and most western countries. In the past, many of these analyses were based on toxicologic data. However, there ahs been a recent trend toward the increased use of occupational epidemiologic ...
    Public Domain
  • Immunotoxic Effects of Lead
    Immunotoxic Effects of Lead
    Biagini, Raymond E.
    1999/10/09 | National Institute for Occupational Safety and Health (NIOSH)
    Dr. Raymond E. Biagini, Centers for Disease Control and Prevention, Cincinnati, OH, examined the immunotoxicity of lead. He observed that the effects of lead on the immune systems of animals include changes in antibody synthesis, macrophage activity, lymphoproliferative responses, and autoimmune responses (McCabe 1994, McCabe and Lawrence 1994, Zel ...
    Public Domain
  • 1998 Childhood agricultural injuries
    1998 Childhood agricultural injuries
    United States Department of Agriculture. National Agricultural Statistics Service
    1999/10/06 | National Institute for Occupational Safety and Health (NIOSH)
    Approximately 32,800 agricultural-related injuries occurred to children or adolescents under the age of 20 who lived on, worked on, or visited a farm operation in 1998. The injuries occurred at a rate of 1.7 injuries per every 100 farms. The findings are based on a random telephone survey of 50,000 farm operations conducted by the National Agricult ...
  • Relationship Between Hysteresis and Crackles in Control and Tween 20Rinsed Excised Rat Lungs
    Relationship Between Hysteresis and Crackles in Control and Tween 20-Rinsed, Excised Rat Lungs
    Cheng W ;
    Frazer DG
    1999/10/06 | National Institute for Occupational Safety and Health (NIOSH)
    We have examined the relationship between pulmonary hysteresis and the recruitment-derecruitment of lung units (Cheng et al., 1995). The recruitment process is represented by a sequence of discrete events, in which each event represents a configurational change in the lung tissue structure. There is evidence that energy is dissipated in the form of ...
    Public Domain
  • An Improved System for Measuring Breath and Cough Sounds
    An Improved System for Measuring Breath and Cough Sounds
    Frazer DG ;
    Friend KA
    1999/10/06 | National Institute for Occupational Safety and Health (NIOSH)
    Lung sounds are influenced by the geometry and mechanical properties of the airways and lung tissue. If the characteristics of breath and cough sounds related to lung structure and function can be identified and quantified, they may assist in the diagnosis of lung disease. In order to minimize errors associated with many current techniques of measu ...
    Public Domain
  • A System for Reconstruction of Cough Sounds and Cough Sound Components
    A System for Reconstruction of Cough Sounds and Cough Sound Components
    Frazer DG ;
    Friend KA
    1999/10/06 | National Institute for Occupational Safety and Health (NIOSH)
    The purpose of this project is to develop an auscultatory system that could be used to train physicians to identify components of cough sounds associated with lung disease. The system recreates cough sounds obtained using a previously described cough sound recording system [1]. A subject coughs through a mouthpiece coupled to a long flexible tube. ...
    Public Domain
  • Wheeze Duration in Cough Sounds for Disease Characterization
    Wheeze Duration in Cough Sounds for Disease Characterization
    Abrons HL ;
    Frazer DG
    1999/10/06 | National Institute for Occupational Safety and Health (NIOSH)
    Pulmonary physicians use auscultatory techniques to assist in the diagnosis and management of lung disorders. Wheezing is one characteristic that is heard in many types of lung disease. For example, wheezing may be a clinical sign of chronic obstructive pulmonary disease or an asthma episode. To optimize the utility of lung sound assessment, charac ...
    Public Domain
47541 - 47560 / 82805